Twinklefox looks different (less bright) since 0.15.0-b4 & "cool" checkbox is not synced

[NeariX67]

What happened?

The Twinklefox effect is less bright than 0.14.4 (or < 0.15.0-b3). Somehow less LEDs light up using the same effect parameters.
While in 0.14.4 the "cool" checkbox did not change anything, in b4 it does effect how many LEDs are lighting up (looks more like before) but it doesn't get synced to other instances in my network.

To Reproduce Bug

Try this preset:

{"on":true,"bri":255,"transition":7,"mainseg":0,"seg":[{"id":0,"start":0,"stop":234,"grp":1,"spc":0,"of":0,"on":true,"frz":false,"bri":255,"cct":127,"col":[[255,160,0,0],[0,0,0,0],[0,0,0,0]],"fx":80,"sx":128,"ix":255,"pal":50,"c1":128,"c2":128,"c3":16,"sel":true,"rev":false,"mi":false,"o1":false,"o2":false,"o3":false,"si":0,"m12":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0},{"stop":0}]}

On 0.14.4 no LEDs turn off because of the twinkle rate and effect speed. Really good brightness
On 0.15.0-b4 many LEDs turn off. Low brightness

Expected Behavior

No LEDs turn off using full twinkle rate on Twinklefox effect.
Also, "cool" checkbox should sync across all instances.

Install Method

Binary from WLED.me

What version of WLED?

0.15.0-b4

Which microcontroller/board are you seeing the problem on?

ESP8266, ESP32

Relevant log/trace output

No response

Anything else?

No response

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